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Chin. Phys. B, 2009, Vol. 18(3): 1096-1104    DOI: 10.1088/1674-1056/18/3/043
CLASSICAL AREAS OF PHENOMENOLOGY Prev   Next  

Modeling of graded index waveguide fabricated by ion exchange on Er3+ doped glass

Shao Gong-Wang(邵公望) and Jin Guo-Liang(金国良)
Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China
Abstract  A general numerical tool, based on thermal diffusion equation and full-vectorial eigen-mode equation, has been presented for the systematic analysis of graded index channel waveguide fabricated by ion exchange on Er3+ doped glass. Finite difference method with full-vectorial formulation (FV-FDM) is applied to solving the full-vectorial modes of graded index channel waveguide for the first time. The coupled difference equations based on magnetic fields in FV-FDM are derived from the Taylor series expansion and accurate formulation of boundary conditions. Hybrid nature of vectorial guided modes for both pump (980 nm) and signal light (1550 nm) are demonstrated by the simulation. Results show that the fabrication parameters of ion exchange, such as channel opening width and time ratio of second step to first step in ion exchange, have large influence on the properties of waveguide. By optimizing the fabrication parameters, maintenance of monomode for signal light and improvement of the gain dynamics can be achieved in Er3+ doped waveguide amplifier (EDWA) fabricated by ion exchange technique. This theoretical model is significant for the design and fabrication of EDWA with ion exchange technique. Furthermore, a single polarization EDWA, which operates at wavelength from 1528 nm to 1541 nm for HE polarization, is numerically designed.
Keywords:  graded index channel waveguide      finite difference method      full-vectorial mode      ion exchange technique  
Received:  08 April 2008      Revised:  14 September 2008      Accepted manuscript online: 
PACS:  42.79.Gn (Optical waveguides and couplers)  
  42.70.Ce (Glasses, quartz)  
  02.70.Bf (Finite-difference methods)  
Fund: Project supported by the Foundation for Development of Science and Technology of Shanghai (Grant No 022261002).

Cite this article: 

Shao Gong-Wang(邵公望) and Jin Guo-Liang(金国良) Modeling of graded index waveguide fabricated by ion exchange on Er3+ doped glass 2009 Chin. Phys. B 18 1096

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